Previously when Worf goes on the Rotarran, he wears a Klingon uniform. This time he keeps his Starfleet one. Guess he just couldn't be bothered to change.

Plotline

Worf assigns Kor, an ageing Klingon warrior, as third officer of Martoks ship - over the Generals vehement protests. But as they go on a raid into Dominion territory, it becomes clear that the Dahar Master is not what he once was.